Things to try...
Place the project's VPJ file in the same folder as the source files, then close VP and launch it with that VPJ.
Or, resolve a single file and note the path where the file is located. Close VP.
Copy all source files, including the VPJ, to the folder pointed to by that path. Create it if necessary.
If neither of these measures succeeds, please zip all files in that single folder, including the VPJ, and share it...
Upload the zipped folder to a free server, such as Google Drive or MS OneDrive, right-click the link and Share or Copy. Copy the result and paste it here or to me in a Private Message via the mail envelope in the top-right corner of this forum. When using Google Drive, click SHARE | SHARE and change "restricted" to "anyone with link can view.**